14:32 <chewitt> phh: I'm interested to know if the HEVC content that you're playing with your changes is 8-bit or 10-bit?

14:32 <phh> chewitt: hevc is not working

14:32 <phh> possibly because i tried only 10bit content

14:33 <chewitt> on g12a there's an unresolved bug where playing 8-bit HEVC works, but 10-bit wedges the board

14:34 <chewitt> (which I would love to find a solution to)

14:37 <chewitt> there's also a bug with VP9 and content with 29.97/59.94 fractional rates: "[ 469.650609] Fatal Error, invalid HDMI vclk freq 593406"

14:39 <chewitt> something to be aware of if nothing else .. it sucks to test and hit bugs that aren't your own creation :)

14:44 <phh> right thanks. atm i'm not really trying to make it fully working/stable. for the moment i just want to explore what's supported mainline on that platform compared to vendor kernel

14:53 <phh> chewitt: k, playback of hevc 8 bit looks okay (tested with `ffmpeg -c:v hevc_v4l2m2m -y -i jellyfish-3-mbps-hd-hevc.mkv -c:v rawvideo -f nut - | mpv --vo=tct --ao=null -` with debian testing packaged ffmpeg), but meson vdec shouts "Couldn't find ref. frame 0"

14:54 <phh> err no, some frames are okay, but not all

14:54 <chewitt> for ffmpeg use https://github.com/jc-kynesim/rpi-ffmpeg/commits/dev/4.4/rpi_import_1

14:54 <chewitt> it has quite a few improvements for v4l2_m2m

14:55 <chewitt> this is the ffmpeg source for RPi boards which have v4l2_m2m H264 IP (while HEVC is v4l2_request)

14:55 <phh> it's a completely hw component doing h264 decoding from h265 on rpi4?

14:56 <chewitt> i've been working with them for a while to ensure the stuff that is being prepped for upstreaming to ffmpeg still works on other SoC platforms

14:56 <chewitt> RPi4 is basically the same decoders as RPi3 but with an extra IP block from Broadcom to HEVC bolted on the side

14:57 <chewitt> RPi4 is a little unusual in that it mixes both stateful/stateless methods

14:57 <phh> splendid

14:59 <chewitt> unfortunately the 10-bit issue in HEVC has nothing to do with ffmpeg (else it would have been fixed)

15:04 <phh> so yeah, my hevc 8bit decoding is broken just like my vp9 8bit, you can see an example at https://phh.freeboxos.fr:49026/share/7EUrdhoaqHy7loIW/hello.nut ; basically I get two correct frames, then pixels get uh, mangled? like global color is still correct

15:04 <phh> that's with debian's ffmpeg though. I'll try the branch you mentioned soon (but i'm building on target, so it takes a lot of time)

15:10 <phh> checking hevc 10 bit with https://www.larmoire.info/jellyfish/media/jellyfish-3-mbps-hd-hevc-10bit.mkv, first frame is ok, then it breaks but information is still visible. my guess is that the frames read back by the decoder isn't of the expected format by the decoder

15:19 <chewitt> interesting

15:20 <chewitt> i'm using Kodi (a bit fancy wrapper around ffmpeg) as the player app

15:20 <chewitt> so we're using drmprime decoding paths, which might be different

15:21 <chewitt> what sc2 board are you working with?

15:22 <phh> that's not sc2, that's g12a? it's Freebox Player Pop, an ISP STB

15:26 <chewitt> ahh, I misread something

15:28 <chewitt> cute little box

15:28 <chewitt> the g12a box I have for testing is the ugliest piece of crap ever :)

15:40 <chewitt> btw, what was this fixing? https://github.com/phhusson/linux/commit/c996a3a80cf10934d0771633d75ef230391180f6

15:51 <phh> h264 uhd decoding i'd say. but i can't guarantee it was actually fixing something and not that i was hitting another issue

15:51 <phh> (like if the decoder is stuck, maybe the esparser will fill vififo and trigger vififo error just because the decoder doesn't consume it)

15:52 <phh> (or it was when i added a shitload of logs and hw decoding was output 0.3fps because of all the logs)

21:44 <narmstrong> H264 is broken on g12a, a new h264 decoder was started by using the same HW as vp9 & hevc but was never finished

21:45 <narmstrong> The good point we we could bypass ESPARSER and directly feed buffers to the FW (it’s also possible on vp9 & hevc) but there’s nobody available to finish all this…